I currently prefer Soki as a partner because Sokis lvl1 sword purification combines perfectly with all T. blades supers even his omnidirectional. The really compliment each other in that respect.
If T.Blade does 5a, 2a, 5b, 2b, 5c, 3c, JC, j.aa, j.bb, JC, j.2c, Katzbalger ©, lvl1 Voltekka, (Character Switch Super) Soki’s lvl1 sword purification, then after the super throws them upward Omnidirectional Voltekka. Does 40 billion or so for 5 bars.
The real point being that you can interchange quite easily between there supers.
On another note if ur playing as soki and get into a super situation (lolz alliteration) you can use a double super for 3 bars that sync perfectly.
I usually do 5a, 2a, 5b, 2b, 5c, 6c, 623a, 236abcp (Sword Purification and Voltekka) about 23 billion.
The great thing about this is it gives Soki a damge dealling lvl 3 instead of being stuck with just oni mode.
You can switch from sword purification to an omnidirectional voltekka for a good 4 bar slap in the face.
As far as assists ive been trying on with soki with a t. blade assist.
A 6c canceled by bc (does a second hit) into t.blades assist. i think you might be able to hit with a 3c but i haven’t quite been able to get it.